(CNN) -- At long last, a cold front will snap a stubborn heat wave that has roasted much of the country for more than a week.

However, the front is also expected to bring storms as it moves through the Midwest and Northeast on Sunday.

The front has already delivered some relief to the Upper Midwest and Great Lakes. Chicago, for example, should enjoy a temperature of about 82 degrees by late Sunday afternoon -- down from 100 degrees earlier in the weekend.

The forecast high for St. Louis, Missouri, on Sunday, was 97 -- hot enough, but a slight bit of relief for the city, which on Saturday marked its 10th consecutive day of temperatures at or above the century mark.Dog days of summer Dog days of summerCouple pleads for utility's helpHow long will high temps last?Food runs low after devastating storms

A heat advisory remained in effect Sunday for eastern Kansas; southern portions of Missouri, Illinois, Indiana and Ohio; all of Kentucky; and western West Virginia, according to the National Weather Service. Also under a heat advisory were parts of Maryland, Virginia and the Carolinas.

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Heat advisories, watches and warnings were posted for portions of 11 states -- less than half the number of states that have seen them the last few days, said CNN meteorologist Sarah Dillingham.

The front will reduce temperatures into the 80s for Chicago, New York and Washington, and into the 90s for St. Louis by Monday, she said.

The cold front will continue moving south through Monday and Tuesday, CNN meteorologist Alexandra Steele said. Storms associated with the front could bring large hail and strong winds, she said.

Areas near Washington and spots in Virginia, Kentucky and West Virginia were at "slight risk" for storms, Dillingham said, with hail and high winds being the greatest threat.

On Saturday, the weather service received more than 160 reports of high winds, she said.

One person died and a second was injured in the east-central Missouri town of Cuba on Saturday in storms, according to the weather service's Storm Prediction Center. Damage including building collapses, vehicle rollovers and downed power lines were reported, the center said. Another injury was reported Saturday in Mifflinburg, Pennsyvlania, officials said.

But more hot weather may be on the horizon.

"As this ridge breaks down over the East, the West will start seeing another ridge of high pressure build," pushing temperatures into the 90s and possibly 100s in Montana, eastern Oregon and Utah, Dillingham said.

The heat wave has left scores dead and hundreds of thousands without power -- many of them following a round of severe storms that swept the Mid-Atlantic states on June 29.

Nationwide, there have been more than 4,500 daily record highs in the last 30 days, according to the National Climatic Data Center. Also, the heat has brought nearly 240 all-time record highs between June 23 and July 5, Steele said Saturday. The heat has buckled roads in some areas.

Nearly 155,000 customers in 10 states and Washington were without power Sunday. Some have lacked electricity for more than a week.

The hardest-hit state continues to be West Virginia, where nearly 75,000 customers had no power Sunday. Because utilities typically define each residential and business account as a customer, the actual number of people affected was higher.

Sizzling temperatures baked parts of the Midwest and Mid-Atlantic on Saturday. Saturday's high of 107 in St. Louis broke a 103-degree mark set in 1936, said Butch Dye, hydrometeorologist technician for the National Weather Service.

Temperatures topped 100 degrees Saturday in a swath stretching from south-central Iowa to the Chicago area to Louisville, Kentucky, to Virginia, the weather service said. A high of 105 in Washington on Saturday marked the second-hottest day on record for the city and the 10th straight day of temperatures above 95.

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Saturday's death in Cuba, Missouri, came as debris struck a woman's car in a grocery store parking lot during a severe storm, CNN affiliate KMOV reported.

A 4-month-old girl in Greenfield, Indiana, died Saturday after being left in a car for an "extended period of time," police Chief John Jester said. While it wasn't clear how hot it had been inside the car, temperatures in that community of 20,000 people reached 103 degrees. Greenfield is about 25 miles west of Indianapolis.

The baby's grandfather found the young girl and rushed her to the hospital, where she was pronounced dead. Her father, Joshua Stryzinski, was later arrested and charged with neglect of a dependent, resulting in death. Jester said that charge may change after detectives meet with prosecutors.

About 25 miles northwest, in the town of Fishers, Meg E. Trueblood was arrested Saturday for felony neglect of a dependent after her 16-month-old unattended daughter was pulled from a car at a shopping center, police said.

The temperature inside the vehicle reached 124 degrees, and the baby was inside for about an hour, said police spokesman Tom Weger. An officer broke a window to reach the child.

The girl was upgraded to stable condition Saturday night, and was released from the hospital Sunday to her grandmother, Weger said Sunday.

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